thanks yes that is very helpful thanks......

 

I bought a few springs from Grainger. Still haven't had a chance to try out my brakes, I did a 9bolt swap with PBR's. Going to try them out today and hope they work out.

In case anyone was looking for some extra springs, I bought both of the 1NCF2 and 1NCR5 spring packs since I didn't know which would work best.

(Shiny ones) 1NCF2= 22lbs
(Goldish ones)1NCR5= 19lbs

Paid 20$ with shipping and all so if anyone wants one or a few let me know.

 

Glad I found this before I bought a new prop. valve. Should be a sticky or something lol, much cheaper and easier than buying a whole new proportioning valve. Took me about 2 minutes to install the spring. Hopefully they work.

 

i'd be in for one of each, let me know!

 

I installed mines 2 months ago and i could definitely feel the difference in rear braking power, you just have to be careful on wet ground i had to step on the brakes pretty hard coming on a soft turn and the rears locked and the car started to slip so i let go to correct and stop the sliding....fun fun fun . but overall a very inexpensive good upgrade, Hopefully in the near future i would like to add the 1LE kit from SSBC Brakes but its kinda pricy.

 

Sure, just PM me with details. I quoted someone 12$ w/ shipping for one of each. So if you would like one of each as well then ill drop the price to 9$ for the both of you. Since it would save me a trip to the post office.

 

Although I would really like to test them out before sending them out. I'm having problems with my brake system, so my car may not be the best to try them out on.

I test drove it after installing the 22lb spring and did not feel much of a difference at all.

I'm going to jack up my rear tomorrow and put it in gear to see if my brakes lock (unlike before)

 

Make sure you bleed the system, My rear brakes lock up NOW as before they kept spinning while i had the car jacked up in the air.also, i feel better performance when stomping on the pedal from high speed. Grainger sells the springs,they come five per bag for $5.98 a cheap upgrade. here is the link.

http://www.grainger.com/Grainger/wwg...N=0&sst=subset

 

For $9 I will take a set too, sending PM

 

oh man I should just set up a business selling these things lol.... well see, anyone can buy the springs off of Grainger but it makes you go through a whole bunch of crap since it seems to be a commercially based thing? I used my dads real estate business info to sign myself up lol....

 

is this mod only far cars with rear discs or would it work on drum cars too? or is thier a differnt spring for drum cars?

 

Hello First time poster here.
I have enjoyed the site and gathered alot of info from all of you.Thanks

Could one of you with some machining skills fab adjustable screw to fit in valve to preload spring thereby making adjustable valve?
just a thought

 

"Could one of you with some machining skills fab adjustable screw to fit in valve to preload spring thereby making adjustable valve?
just a thought"

Yes, it has been done and does work. However changing the spring pretty much accomplishes the same thing for a lot less money.

 

do you have any springs and how much are they 53086 I doing a rear disc brakes on a86 IROC Z will the rear rotor from a 4th gen fit and are they bigger and better ??

 

do you still have the spring's for sale are could I just go say a hardware store and find them ? 53086 and will going to a 4th gen rotor help and will they fit ?? working on a 86 IROC Z Camaro

 

You can't simply exchange a fourthgen rotor for a thirdgen. The swap must be complete, to include backing plates--if so designed--calipers, rotors, parking brake cables and combination valve. The fourthgen LT1 (93-97), which are much like the 89-92 version, and the LS1 swap have been done many times, so our site has a mountain of info. You can start here:

https://www.thirdgen.org/forums/faq-...iscs-89-a.html

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC

 

I know this thread is a little old, but I went to install my 90-92 proportioning valve for PBR rear discs (so I was told) on my 89 Iroc-z convertible (disc/drum) and all the threads were different. Well, all but one I should say.

I removed the internals from both and swapped them around. I took a picture in the mean time because I remembered someone asked if just the spring could be changed for the disc/drum valves. Here is what I found: Drum internals on the left, disc on the right.


The anodized parts are different, as well as the spring ID and the perch in the cap. If you could find a stiffer spring that match the same dimensions I don't see why it wouldn't work. Hope this helps.

 

so for this to work on my 86 i have to get a 1989 prop valve and then buy the spring kits and also what would be the best spring since i just upgraded to 1LE front and the '89 9 bolt J65 PBR rears with the 11" disk

 

I use the first design 1LE valve for my 1LE set-up, front and rear, without spring modification, and the braking power is first rate.

 

but isnt the first design 1LE hard to come by

 

Ed's a bit slow right now, but....

http://www.flynbye.com/catalog/i40.html

JamesC

 

I don't want to take business away from Ed, but I'm curious to know the difference between:
'82-89 stock and '82-89 1LE/J65 valves
'90-92 stock and '90-92 1LE/J65 valves
'82-89 1LE/J65 and '90-92 1LE/J65 valves

I assume the blocks themselves are the same, so just a different vavle and spring? I assume the front metering is different as well so there isn't a delay on the fronts.

I used the stock internals out of a '90-92 disc/disc valve and put them in my '89 disc/drum vavle. I have LS1 fronts and a '97 rear, so the rear calipers are the same PBR's AFAIK. Not sure when I'll have the new setup running in order to test this out.

 

All four-wheel disc cars are J65. All 89+ cars have the so-called performance/1LE rear disc set-up.

82-88 standard disc brakes (10.5" discs and Delco-Moraine iron calipers).
89-92 performance/1LE disc brakes (11.7" discs and PBR alum calipers). Because of thread differences, there are two valves, a first design which fits 84 to early 89 cars (used when retro fitting) and a second design which fits late 89 though 92 cars.

What the internal differences might be, I can't say.

JamesC

 

@james im sorry i guess i over looked it de de de lol

 

Looked up the springs in the MSC catalog and figured I would add that part number to the list here
06812184(30.69 lbs/inch)

Also something else that should be noted is that the stainless steel versions have a different spring rating than the regular one. Stainless steel part number
03308632(25.56 lbs/inch)

 

Anyone have an extra spring they'd like to sell me? Grainger here in Canada doesnt carry them and I cant order them from the states...

Thanks

 

i have sum...give me ur info..i have the 19.11lbs..

 

ok so i read this whole thing and i want to know which spring i should buy,
(Shiny ones) 1NCF2= 22lbs
(Goldish ones)1NCR5= 19lbs)

i didnt see where anyone specified which spring they used for the 4th gen rear PBR calipers, my car was originally a drum rear its an 89 Formula, so which is the correct spring for my application?

 

can i put this spring in a factory 88 car with disk brakes... i have a 88 gta.... will i need to bleed the brakes....

 

Has anyone tried this on an '82-'83 prop valve yet?

 

no but id sure like to know if it would work i got ls1 rear brakes and will be in need of a adjustment. Worst case u could pickup a drum al port valve and convert it to disk. would it be cheaper than buying new? i know the threads would be diffrent but u could just find some adapter fittings

 

I put one in a stock valve from a 1987 Trans Am, BTW you'l always have to bleed if you mess with brake lines/connections.

I did this mod also on my 1985 Z28 with the old school cast iron valve, works like a champ!

 

Interesting. Did you test the valve/spring in some manner, or did you reply on the seat of your pants?

JamesC

 

Brakes aren't spongy any more, feels like pressure is building, brake light is now off...anything else?

 

It would be interesting to know how various springs affect bias.

Ed Miller furnishes the mod as seen below. What his modification(s) is would be also be interesting to know.

http://www.flynbye.com/catalog/i160.html

Best of luck with your ride.

JamesC

 

The '85 and '83 prop valves are a different design, no?

 

I've read about and seen the old-style valves as late as 85. Somewhere in there they went from SAE to metric. The physical design of the iron and alum valves is a bit different.

JamesC

 

Would the spring mod, give the same effect, regardless?

 

Can't imagine why not. Staff Sargent Arvizu seems happy enough. Hopefully, he'll chime in with more info.

JamesC

 

Mod works for me, that's all I can add

I'm confident Jari in Finland will say the same when he gets the springs I just mailed him.

BTW, I'm a retired SSgt, please don't thank me, it was my privilege to serve

 

BTW, externally, the PV on my '83 and '85 look the same, except that the '83 is cast iron and the '85 looks like it's aluminum.

Can someone show me a picture of which orafice the spring goes into? I'm assuming the front one with the brake line attached to it?

 

On the old style, a brake line goes into the front (nose) of the valve, on the new style the line goes underneath the valve. Pics of the new style below.

JamesC

 

Where would the new spring go on the old style?

 

Yup, that looks like the one on my '89. Both my '83 and '85 have the less blocky looking old style - like this:



My '83 looks exactly like the above pic, my '85 does as well, except the '85 appears to be made of aluminum.

 

It would go inside the vertical chamber. The circled portion of your pic. The plug/fitting req's a 3/4" wrench.

 

Awesome! Thanks man. Got any more springs that you can sell?

 

I've got one 1NCF2 left. $2 shipped

Paypal: Arvizu9618@***.net

LMK,

RT

 

I will post results after I have measured brake line pressures with original, and stiffer spring.

 

Excellent, as I'm interested in the effects of the spring swap.

JamesC

 

I have a 83 camaro but mine doesn't have the chamber there it has it on the end pointing to the driver side. I'll try to post a picture later on. And I can't give results just yet because I'm replacing my lifters...:/..